Reversible Affective Symptoms and Attention Executive Control Network Impairment Following Thyroid Function Normalization in Hyperthyroidism
Received 15 August 2019
Accepted for publication 11 November 2019
Published 26 November 2019 Volume 2019:15 Pages 3305—3312
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Yuping Ning
Lili Yuan,1,* Yuanxiang Zhang,2,* Di Luan,1 Xiangjun Xu,1 Qian Yang,1 Shoucai Zhao,1 Zhiming Zhou1
1Department of Neurology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui Province, People’s Republic of China; 2Department of Clinical Pharmacy, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui Province, People’s Republic of China
*These authors contributed equally to this work
Correspondence: Lili Yuan
Department of Neurology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui Province 241000, People’s Republic of China
Introduction: Affective symptoms and attention impairments are found in patients with hyperthyroidism. Our previous data have revealed that the patients with hyperthyroidism experience impairments of the attention networks, but it remains unclear whether these disorders persist after the treatment of hyperthyroidism.
Methods: Twenty healthy controls and 25 hyperthyroid patients were recruited and performed the attention network test (ANT) which can simultaneously examine the alertness, orientation and execution control components of the participants. The effect of treatment on affective symptom and attention networks impairments were examined in the patient group after 1-year anti-thyroid medication and reaching euthyroidism for at least 3 months.
Results: Anxiety and depression scores of patients with hyperthyroidism were significantly higher than those of the healthy control group. The patients with hyperthyroidism had impairments of the alerting and executive control networks. Meanwhile, the score of HAMA correlated significantly with thyroid hormone and TSH levels, and there was a negative significant correlation between the score of HAMD and TSH level in all subjects. There was a positive correlation between the value of the executive control network and thyroid hormones’ levels in all subjects and in the hyperthyroidism group. Anxiety and depression symptoms were improved with methimazole treatment after euthyroidism was reached. The value of the executive control network no longer differed from that of healthy controls, but deficits in the alerting network of hyperthyroidism still persisted after treatment.
Conclusion: The patients with hyperthyroidism existed affective symptoms and attention networks impairments. Affective symptoms and attention executive control network impairment were improved following thyroid function normalization in hyperthyroidism.
Keywords: hyperthyroidism, thyroid hormones, cognition, affective symptoms, attention network test
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